0cb1595215
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@246 42af7a65-404d-4744-a932-0658087f49c3
84 lines
2.7 KiB
Plaintext
84 lines
2.7 KiB
Plaintext
NuttX TODO List
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^^^^^^^^^^^^^^^
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o Task/Scheduler
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- When a tasks exits, shouldn't all of its child pthreads also be terminated?
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- Should task_delete() cause atexit() function to be called?
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- Implement sys/mman.h and functions
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- Implement sys/wait.h and functions
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- Implement priority inheritance
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- Make the system timer frequency configurable via defconfig. See:
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_POSIX_CLOCKRES_MIN in limits.h
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CLK_TCK in time.h
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MSEC_PER_TICK in sched/clock_internal.h
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- Consider implementing wait, waitpid, waitid. At present, a parent has
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no information about child tasks.
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- Several APIs do not set errno. Need to review all APIs.
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o Memory Managment
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- Add an option to free all memory allocated by a task when the task exits.
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This is probably not be worth the overhead for a deeply embedded system.
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- Current logic adapts size_t for 16-bit address machines vs. 32-bit address
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machines. But a small memory option should also be provided so that
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the small offset option can be used with 32-bit machines that have small
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RAM memories (like the lpc2148)
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o Signals
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- 'Standard' signals and signal actions are not supported.
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o pthreads
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- pthread_cancel(): Should implemenent cancellation points and pthread_testcancel()
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o Network
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- Port FreeBSD TCP/IP stack
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o USB
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o Libraries
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- sscanf() and lib_vsprintf() do not support floating point values.
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o File system
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- Add disk usage stats, stat(), chmod(), truncate().
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- FAT32: long file names, unlink(), mkdir(), rmdir(), rename()
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o Console Output
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o Documentation
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- Document fs/ & driver/ logic
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- Document C-library APIs
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o Build system
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- Some names under arch are still incorrect. These should be processor architecture
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names: pjrc-8051 should be 805x
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- configs/pjrc-8051 should be configs/pjrc-87c52
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- Last change to create the arch/arm directory breaks dependencies in arch/arm/src.
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Probably need to add the path to the chip or common subdirectorys when
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running tools/mkdeps.sh
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o Applications & Tests
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o C5471
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o DM320
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o LPC214x
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- Finish
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o pjrc-8052 / MCS51
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- Current status:
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- Basic OS task management seems OK
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- Fails when interrupts enabled. The stack pointer is around 0x6e
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before the failure occurs. It looks like some issue when the
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stack pointer moves from the directly to indirectly addressable
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region (0x80 boundary).
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- Work on the 8052 is temporarily on hold
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- Use timer 0 as system timer. Timer 2 is needed for second UART.
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Logic is implemented, but there needs to be a system configuration
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to change the ticks-per-second value to match the timer interrupt
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rate
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- During build, there are several integer overflows reported:
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gmtime_r.c aroud lines 184 and 185
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clock_initialize.c at line 107
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pthread_create.c at 330
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sighand.c at 225 and 244
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